Aaron Monroe, CFA | Diamond Hill

Portfolio Manager

Aaron serves as a portfolio manager for Diamond Hill and joined the firm in 2007. From 2007 to 2008, he was an equity trader for Diamond Hill.

Prior to joining Diamond Hill, Aaron was a consulting group analyst with Smith Barney from 2006 to 2007. In 2005, he was an associate with Duff & Phelps.

Aaron has a Bachelor of Science in finance, accounting and economics from The Ohio State University (cum laude).

Strategies managed

Small Cap Strategy, Portfolio Manager

Recent insights

Beyond the Build

29 September 2026

While artificial intelligence (AI) may live in the cloud, the infrastructure required to support it is decidedly physical, pulling the tangible world back into focus. Aaron Monroe explores how demand is broadening beyond data centers as grid modernization, reshoring and broader infrastructure investment converge—creating a more diverse and potentially durable opportunity set for the small businesses providing the materials, equipment and expertise behind the build.

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Capital Asleep at the Wheel: Neglected Opportunities in Small Companies

13 July 2026

Discover why small-cap investing presents a unique opportunity in today's market. Learn how passive shifts, asset manager concentration, and sell-side declines have created a fertile ground for value investors in the small-cap space. (6 min read)

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Obvious Demand, Overlooked Businesses

1 July 2026

Sources of durable demand may seem obvious, but the small companies positioned to benefit can remain overlooked. Explore how patient investors can uncover opportunity in underfollowed markets.

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